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20VQ high-speed, high-pressure vane pump

Key words:Hydraulic tools

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VQ series high-speed and high-pressure vane pumps

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Specification

Model	Displacement Code	Geometry Displacement mL/r	Anti-wear oil or Phosphate ester liquid		Weight Kilograms
Model	Displacement Code	Geometry Displacement mL/r	Maximum Pressure MPa	Maximum Speed r/min	Weight Kilograms
20VQ	2	7.5	14	2700	12
	3	10.2
	4	12.8
	5	16.7	21
	6	19.2
	7	22.9
	8	26.2
	9	28.8
	10	31.0
	11	35.0
	12	37.9	16
	14	44.2	14

Note: ①When the working fluid is phosphate ester liquid, use special seal (FPM). When ordering, add the prefix [F-] before the specified model. ②The outlet pressure must always be higher than the inlet pressure.

②The outlet pressure must always be higher than the inlet pressure.

Model Code

Installation and Use

1. During installation, the concentricity tolerance of the pump shaft and the motor must be less than 0.10 mm (TIR), and the maximum allowable angular error must be less than 0.2 degrees. Use a flexible coupling; the pump shaft must not bear radial and axial loads; the bracket must be strong, rigid, and able to fully absorb vibrations.

2. Set the suction pressure of the pump inlet port: The recommended inlet pressure is 0 to 35 Kpa.

3. The oil should be kept clean, and the pipelines and oil tank must be thoroughly cleaned; the cleanliness of the oil should be within NSA12.

4. Normal pump operation (under rated conditions) is based on the use of SAE10W oil (or equivalent viscosity) in the range of 38℃ to 82℃.

5. Check the inlet, outlet, and rotation direction before starting the pump. After fixing the pump, manually rotate the pump shaft smoothly and flexibly. During the first start-up, if the pump does not pump water immediately, air should be drained from the pump's delivery pipeline.

6. During the first use, the pump body and oil suction pipe should be filled with oil, and the pump should not run without oil.

7. Do not start the pump when the outlet pressure is lower than the inlet pressure. This will cause operating noise and blade instability.

8. Cold start conditions: When operating SAE10W oil, the viscosity is in the range of 860 to 40 cSt, and the speed and pressure should be limited to 50% or less of their respective rated values until the system warms up. When the fluid viscosity is greater than 860 cSt, extreme care must be taken when starting the equipment, and attention should be paid to heating the entire system, including remote cylinders and motors.

9. At high temperatures, the viscosity should not be lower than 13 cSt, and the temperature should not exceed 99℃, because the expected life of the card-type airbag and elastomer will be reduced.

Installation Connection Dimensions

◎ Key Shaft

Model	Shaft Cooling	A	B	C	D	E	F Key Width × Length
20VQ	1	59	9.5	12.0	22.225/22.20	24.5/24.35	4.75×32

◎ Splined Shaft

Model	Shaft Cooling	A	B	C	D	E	Spline Data
							Number of Teeth Number of Teeth	Pitch	Major Diameter Minor Diameter	Square Root Minor Diameter	Matching 16/32
20VQ	151	41.1	9.5	11.1	3.9	27.8	13	22.17/22.15	18.63/18.35	Major Diameter Fit	Large diameter fit

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